import 'package:mask_text_input_formatter/mask_text_input_formatter.dart'; var mobileFormatter = MaskTextInputFormatter( mask: "+63 (###) ###-####", filter: {"#": RegExp(r"^[1-9][0-9]*$")}, type: MaskAutoCompletionType.lazy, initialText: "0"); var landLineFormatter = MaskTextInputFormatter( mask: "(###) ###-###", filter: {"#": RegExp(r"^[0-9]")}, type: MaskAutoCompletionType.lazy, initialText: "0");